Aliens?

Nights in England are coal black, making parachute jumps very difficult. We attach small lights called chemlites to make our jumpsuits visible to the rest of the team.

Late one night, lost after a practice jump, we knocked at the door of a small cottage. When a woman answered, she was greeted by the sight of five men festooned in glowing chemlites. "Excuse me," I said,

"Can you tell us where we are?"

In a thick English accent, the woman paused before answering and then replied, "Earth."